What is the complete subject of this sentence cousin a big strong worker but little woman still can put him in his place?

Here's why:

* Subject: The subject of a sentence is the person, place, or thing that performs the action of the verb.

* Complete Subject: The complete subject includes the subject and all of its modifiers (words that describe or tell more about the subject).

In this case, the subject is "cousin" and it is modified by the phrase "a big strong worker." This entire phrase is needed to fully understand the subject.